percussion instrument
Musical instrument played by being struck with the hand or a beater, crashed, shaken, or scraped. Percussion instruments can be divided into those that can be tuned to produce a sound of definite pitch, such as the timpani, tubular bells, glockenspiel, xylophone, and piano, and those of indefinite pitch, including the bass drum, tambourine, triangle, cymbals, castanets, and gong.




